Last updated: May 3, 2025
In Thoi Lai, Vietnam, being aware of the UV Index is essential for maintaining your skin health and preventing sunburn. With elevated UV levels peaking around midday, understanding these readings can help you take necessary precautions during your outdoor activities. Thoi Lai’s tropical Aw climate typically results in intense sun exposure, particularly during the hours when the UV Index reaches a maximum of 14. By staying informed about local UV levels, you can effectively safeguard your skin while enjoying the vibrant outdoors.
The UV Index reaches its peak intensity at 12:00 PM with a striking 14, signaling the need for sun protection. The day starts gently with a low of 1 at 07:00, gradually climbing to 4 by 08:00. By 09:00, it escalates to 7, leading into the intense mid-morning burst that hits 11 at 10:00. From 11:00 AM to 12:00 PM, caution is essential as the index soars, peaking at 13 and remaining high at 12 by 01:00 PM. As the afternoon wears on, the index begins to retreat, dropping to 9 at 02:00 before declining further to 5 by 03:00. The sun's strength diminishes significantly past 04:00, concluding the day at a manageable 1 and finally resting at 0 by 07:00 PM. Stay vigilant during the peak hours to protect your skin from harmful UV rays!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 4 | moderate | 30 min |
| 09:00 | 7 | high | 25 min |
| 10:00 | 11 | extreme | 10 min |
| 11:00 | 13 | extreme | 10 min |
| 12:00 | 14 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 5 | moderate | 30 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, the UV Index experiences significant changes, particularly peaking in the first half. January starts with a UV Index of 10, categorized as very high, where a burn can occur in just 15 minutes. However, the intensity escalates dramatically from February to April, with the UV Index reaching a maximum of 15 in March, classified as extreme, necessitating vigilance as burn times shrink to just 10 minutes. This high-risk period continues through May, June, July, and into August, with similar UV levels persisting and caution advisable. As the year progresses into the fall, the UV Index remains elevated, particularly in September and October, yet begins to taper off by November and December with a return to very high levels but longer burn times of 15 minutes again. Visitors and residents are advised to take necessary precautions—such as wearing sunscreen, protective clothing, and seeking shade—especially during the peak months from February to October when UV exposure poses a greater risk.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hanoi UVI | 8 | 10 | 12 | 12 | 13 | 12 | 12 | 13 | 13 | 11 | 9 | 7 |
| Haiphong UVI | 8 | 10 | 12 | 13 | 12 | 13 | 13 | 13 | 13 | 11 | 9 | 7 |
| Da Nang UVI | 10 | 12 | 14 | 15 | 14 | 13 | 14 | 14 | 13 | 12 | 10 | 9 |
| Ho Chi Minh City UVI | 10 | 13 | 15 | 14 | 14 | 12 | 13 | 14 | 13 | 13 | 11 | 10 |
| Bien Hoa UVI | 10 | 14 | 15 | 15 | 14 | 13 | 14 | 14 | 13 | 12 | 11 | 10 |
| Thoi Lai | 10 | 13 | 15 | 14 | 14 | 13 | 13 | 14 | 14 | 13 | 11 | 10 |